Castleford, ID Radon Levels

Q: What EPA Radon Zone is Castleford in?

Castleford is in Twin Falls County, EPA Zone 2.

Q: How much does radon mitigation cost in Castleford?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Castleford radon levels and find certified testing and mitigation professionals to keep your home safe

Castleford, ID Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Twin Falls County, ID

Zip Code 83321

Found in Twin Falls County in southern Idaho's Snake River Plain, Castleford sits atop basaltic bedrock and volcanic deposits that can produce variable radon levels depending on soil conditions. The rural community's housing reflects typical Idaho agricultural area construction, with many homes featuring full basements or crawl spaces. With no current testing data for zip code 83321, homeowners should conduct individual radon testing to determine their specific risk.

Castleford, ID Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon FAQ for Castleford, ID

What EPA Radon Zone is Castleford in?

Castleford and the 83321 zip code are in Twin Falls County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Castleford?

Radon mitigation in Castleford typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Castleford?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Idaho

Cities in Idaho with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Idaho Falls	7.29 pCi/L	7
Hailey	7.83 pCi/L	6
Post Falls	9.00 pCi/L	5
Coeur D Alene	9.00 pCi/L	4
Moscow	7.75 pCi/L	4
Victor	6.67 pCi/L	3
Driggs	16.00 pCi/L	2
Hayden	8.50 pCi/L	2
Pocatello	8.50 pCi/L	2
Eagle	6.00 pCi/L	1